<p><a href="http://collegeboard.com/prod_downloads/ap/students/economics/ap06_frq_micro.pdf%5B/url%5D">http://collegeboard.com/prod_downloads/ap/students/economics/ap06_frq_micro.pdf</a></p>
<p>alright so on #2 part c).. it asks about the profit maximizing quantity of output. The easiest and most straightforward way to do it was to do revenue-cost for all the quantities and pick the one with highest profit..</p>
<p>but I did not see that T___T (didn't know until my friend told me about it later)</p>
<p>Soo here's what I did:
I figured that the total cost function was a quadratic and did a couple of systems of eqs to find the function. max profit occurs when MR=MC. MR was given in the problem, and MC is by definition the slope of TC, or dTC/dQ. I then differentiated the TC(Q) function and equate it to MR and solved for Q.</p>
<p>I got the same answer if I had done it the other way.. but I'm not sure if this method would be on the scoring guideline for AP graders. Should I send CB a email about this or will they see that this is another way to do it and give me the points? btw.. did anyone else do it this way?</p>
<p>i'm pretty sure if you're method solved the problem correctly, it'll be A-okay with the CB unless they specified otherwise</p>
<p>why in the world would use such a complicated method? isn't the answer 4</p>
<p>yeah, if you understood that profit-maximization occurs at mr=mc, you should have been able to get the answer without all of that calculus bs. I'm not sure whether the collegeboard will honor your answer or not, because you kind of overlooked a very simple economic concept. They'll give you the point for the answer, but I'm not sure if you'll get the point for the method.</p>
<p>....wooow</p>
<p>you knew MC=MR and....wow??!?</p>
<p>LMAO....</p>
<p>im sure you'd get the credit... after all isn't economics the one subject where you can never be wrong?</p>